Home / 138,402,280.20-207,603,420.30-80,864,934.60

Finding the Fourth Proportional to 138,402,280.20, 207,603,420.30 and 80,864,934.60

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Solution

The fourth proportional to 138,402,280.20, 207,603,420.30 and 80,864,934.60 is: 121,297,401.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,402,280.20 : 207,603,420.30 = 80,864,934.60 : x
  2. Step 2: Convert to fraction form
    138,402,280.20/207,603,420.30 = 80,864,934.60/x
  3. Step 3: Cross multiply
    138,402,280.20x = 207,603,420.30 × 80,864,934.60
  4. Step 4: Simplify right side
    138,402,280.20x = 16,787,837,005,295,812
  5. Step 5: Solve for x
    x = 16,787,837,005,295,812/138,402,280.20
  6. Step 6: Final answer
    x = 121,297,401.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.